Etymology
Exhilalāre, Hilarus, cheerful.

To cause someone to feel very happy elate

To proceed or continue in an unsteady or weakening manner.

The origin of the English word falter is uncertain. It is related to Old Norse faltrask. It make come from the word fald.

To extend sharply outward or upward, project

The verb jut comes from a Middle English noun. The Middle English noun came from the Old French word jetee.